Susanna Clark definitely seems to suggest this, but Shakespeare wrote about that "great magician, damned Glendower" who was a Welshman.
– DukeZhouAug 12 at 20:42

The words "magician" and "witch" have very different etymologies in English. Around the time of Shakespeare, a magician would be someone practicing legerdemain, whereas "witch" would have meant to Shakespeare a woman supposed to have dealings with the devil or evil spirits and to be able by their cooperation to perform supernatural acts.
– CodosaurAug 21 at 20:17